Plot hole: In "The Evil Beneath", after Jimmy, Carl, and Sheen escape Dr. Moist's secret lair, they fly back in the hover car where they start seeing some evil fog shadows, and take off. Earlier, being out of fuel was the cause of the hover car's crash landing, but somehow it's been refilled to escape.

Cindy: Origami - the ancient art of Japanese paper folding. I will be making the most difficult of all origami sculptures - a snow monkey...Jimmy: Actually, paper folding originated in China...Cindy: ...riding a flying dragon...Jimmy: ...in the second century CE...Cindy: ...while drinking tea... Jimmy: ...and was brought to Japan... Cindy: ...on a ladder... Jimmy: ...in the sixth century! Cindy: ...in December! Miss Fowl: Cindy, I didn't know you and Jimmy were doing your report together!

In the episode "The N men", when Jimmy is in his lab, in the shot where the camera zooms into his eye, in the shot just before that shot, notice the digital clock on Jimmys counter. The seconds part jumps From The 30's to the 40's twice in two different shots.